
.all_bg{
  position: absolute;
  bottom: 0;
  left: 0;
  z-index: 0;
}

#canvas1{
  position: absolute;
  left: 0;
  bottom: 0;
  z-index:1;

}

#canvas2{
  position: absolute;
  left: 0;
  bottom: 0;
  z-index:0;

}